AI assistants are creating two classes of writing. The first is dense, information-transfer text (like a technical plan) best consumed and summarized by an agent. The second is storytelling with a personal "vibe" intended for human readership and emotional connection.
For tools designed for AI interaction, the ease with which an agent can use the product (AX) is as critical as the user experience (UX) for humans. This can be improved by directly asking the agent for feedback on how to make the product more ergonomic for it.
The intentional simplicity of a tool like Proof, which lacks a central document index, makes it a frictionless "sketchpad." This allows for rapid brainstorming with AI agents without the organizational overhead or "contamination" of formal systems like Notion or GitHub.
Because AI generates comprehensive plans so quickly, their value is often temporary. This challenges the assumption that all documents need a permanent, organized home, suggesting that ephemeral, link-based access is sufficient for many AI-driven workflows.
Unlike humans, who face social consequences for ruining a shared document, AI agents have immense power but no responsibility. This creates a novel UX challenge: preventing multiple agents working together from degrading or "polluting" a collaborative document with bad edits.
The team's initial product, a Mac app to track human vs. AI contributions, saw little traction. Adoption skyrocketed only after pivoting to a web-based document for real-time collaboration between people and their AI agents, revealing the true product-market fit.
Proof wasn't a top-down initiative but a side project built by the CEO during his spare time. This "vibe coding" approach solved a real, felt need internally, resulting in rapid organic adoption and a culture where everyone started contributing to the product.
When AI agents handle the bulk of text generation, the human's role shifts from primary author to a high-level director. Instead of writing from scratch, the human intervenes sparingly to make crucial changes, a feeling described as "God coming down" to add a single sentence.